Slightly on topic, why does the singer have a female name?
Also, was it always called show you my brave heart?
I think he just called it that for the PV title. Idk why but no, it's always been called "Brave Heart" AFAIK. Even the single is called it I think?
https://en.wikipedia.org/wiki/Ayumi
It's a feminine name so not sure why he was given it, maybe his parents just liked the name? (I did think Ayumi was female until I first saw him though due to the name >.>)